Detailed explanation of the filter settings of angular ui-grid

Previously, I need to review the settings of angular ui-grid filters recently, so I posted it to the essay.

var app = ('app', ['', '']); 
 
('MainCtrl', ['$scope', '$http', function ($scope, $http) { 
 $ = { 
  columnDefs: [ 
   { field: 'name' }, 
   { field: 'amount', name: 'Number', cellFilter: 'fractionFilter' }, 
   { field: 'amount', name: 'Currency', cellFilter: 'currencyFilter:this' } 
  ] 
 }; 
  
 $('') 
 .success(function (data) { 
  $ = data; 
 }); 
}]) 
 
.filter('fractionFilter', function () { 
 return function (value) { 
  return (0); 
 }; 
}) 
 
.filter('currencyFilter', function () { 
 var currencyMap = { 
  'dollar': '$', 
  'pound': '£', 
  'euro': '€' 
 }; 
  
 return function (value, scope) { 
  return currencyMap[] + (2); 
 }; 
})

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